Hello Laura,
Can you update your FSL to the latest version ( 5.0.8. ) and re-run the analysis?
Kind Regards
Matthew
> Thank you for your response. We are using FSL 5.0.5.
>
>> On Jan 23, 2015, at 6:32 AM, Matthew Webster <[log in to unmask]> wrote:
>>
>> Hello Laura,
>> Can you let me know what version of FSL you are using?
>>
>> Kind Regards
>> Matthew
>>
>>> Dear FSL experts,
>>>
>>> I am attempting to run a higher level analysis in FEAT to contrast two tasks performed in separate runs (within-subject analysis). I ran a Fixed Effects model for one subject contrasting the two tasks (design attached). I encountered the following fatal error message:
>>>
>>> Higher-level stats
>>>
>>>
>>> cat ../design.lcon | awk '{ print }' > design.lcon
>>> /usr/share/fsl/5.0/bin/flameo --cope=filtered_func_data --vc=var_filtered_func_data --dvc=tdof_filtered_func_data --mask=mask --ld=stats --dm=design.mat --cs=design.grp --tc=design.con --runmode=fe
>>> Log directory is: stats
>>> Setting up:
>>> ntptsing=2.000000
>>>
>>> evs_group=1.000000
>>> 1.000000
>>>
>>> No f contrasts
>>>
>>> WARNING: The passed in varcope file, var_filtered_func_data, contains voxels inside the mask with zero (or negative) values. These voxels will be excluded from the analysis.
>>> nevs=2
>>> ntpts=2
>>> ngs=1
>>> nvoxels=280026
>>> Running:
>>> nmaskvoxels=280026
>>> 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100
>>> Saving results
>>>
>>> Log directory was: stats
>>>
>>> /bin/rm -f stats/zem* stats/zols* stats/mask* ; /bin/mv dof stats
>>>
>>> /usr/share/fsl/5.0/bin/smoothest -d 0 -m mask -r stats/res4d > stats/smoothness
>>> WARNING: Extreme smoothness detected in X - possibly biased global estimate.
>>> WARNING: Extreme smoothness detected in Y - possibly biased global estimate.
>>> WARNING: Extreme smoothness detected in Z - possibly biased global estimate.
>>>
>>> FATAL ERROR ENCOUNTERED
>>> WARNING: Extreme smoothness detected in Z - possibly biased global estimate.
>>> while executing
>>> "if { [ catch {
>>>
>>>
>>>
>>> for { set argindex 1 } { $argindex < $argc } { incr argindex 1 } {
>>> switch -- [ lindex $argv $argindex ] {
>>>
>>> -I {
>>> incr argin..."
>>> (file "/usr/share/fsl/5.0/bin/feat" line 119)
>>>
>>>
>>> Any ideas about what went wrong?
>>>
>>> Laura
>>> <design.png>
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